Patents by Inventor Leif H. B. Hellander

Leif H. B. Hellander has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Exterior wall system and method of constructing same
    Patent number: 5657602
    Abstract: An exterior wall system for a side of a building includes a plurality of prefabricated composite panels which are positioned in courses above an elongated support bracket attached to a support structure of the building, the composite panels being connected to the building support structure by fasteners which extend through washers that each extend in part into grooved channels in the sides of abutting panels from adjacent courses. The courses of panels are covered by a seamless layer of a hardened mixture of binder and aggregate material such as marble.
    Type: Grant
    Filed: February 6, 1996
    Date of Patent: August 19, 1997
    Inventor: Leif H. B. Hellander